Sash-holder



(Model.)

C. B. CLARK.

-SASH HOLDER.

N. 247.310. Patented sept. 20,1881,

gag/0MM wad/@m www /m UNITED STATES PATENT OFFICE.

CHARLES B. CLARK, OF DETROIT, MICHIGAN.

sAsH-i-ioLDER.

SPECIFICATION forming part of Letters Patent No. 247,310, dated September 20, 1881.

Application filed July E6, 1881.

To alt whom it may concern:

Beit known that I, CHARLES B. CLARK, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented new and useful Improvements in Sash-Locks, of which the following is a specification.

My invention Arelates to that class of sashlocks in which the sash is held at any desired elevation by means of a pair of spring-jaws, which are provided with a pair of levers fuli crumed by means of a pin passing through the levers and the lock-case.

The objectot myimprovement is to dispense with the fulcrum-pin heretofore employed, and to provide enlarged bearings in the walls of the lock-case, and also to furnish a cheap, strong, and effective sash-lock and lock-case.

To suchend it consists,iirst, in a pair of levers adapted to constitute expansible jaws and handles, and formed with disks received into cup-shaped recesses formed in the lock-case to serve as bearings for the disks; second,in a pair of levers in the sash-lock, each formed with a concavity about intermediate of its ends, and a disk formed alongside of each concavity, whereby, when saidlevers are brought together and inclosed within the lock-case a chamber for the spring will be formed between the opposing faces of the two disks and the walls of the said concavities third, in the combination,with a pair of levers provided with expansi-ble jaws with curved or segmentshaped ends, in a sash-lock,of a stop-plate adapted to be secured to the window-frame and formed with concavities to receive the ends of the jaws and with a stud or projection intermediate of the said concavities, substantially as hereinafter described.

In the drawings, Figure l is a side view of a sash-lock constructed in accordance with my improvement and applied to a window-sash. Fig. 2 represents the lock with the cap-plate removed. Fig. Sis a transverse section taken through the lock on the line a: x, Fig. 1. Fig. 4 represents, in perspective, the under side of the cap-plate. Fig.5 is a likeviewof the baseplate, and Fig. 6 is a perspective view of one of the levers.

The pair of leversAA employed in this sashlock are fulcrumed at points about interme- (Model.)

diate of their ends, so as to provide a pair of expansiblejaws, a a, projecting from one side of the lock-casing, and a pair of handles, a a', projecting from the opposite side ofthe casing, for operating the said expansiblejaws. These jaws are closed or retracted to within a short distanceof each other by means of a spring arranged to act against the same within the lockcasing, and the jaws are expanded or moved apart by the application of pressure upon their handles. l

The outer ends ot' thejaws are each formed with a curved or segmental bearing-face, a2, and to the window-frame or confining-strip are secured any desired number of stop-plates, B, each of" which is formed with two concaved portions, b b, to receive the curved ends or i'aces a2 of the jaws. The stop or check plate is also formed with a lug or projection, b', intermediate ot' its two concavities, the said lug or projection being griped between the ends of the jaws when the lock is brought opposite to such stop or check plate.

ln some instances the expansible jaws of a sash-lock belonging to this class have been provided with enlarged ends, which bear directly upon the window-frame or confining-strip and are jammed against the same by the action of a spring. While in the present sash-lock to which my improvement is applied the jaws might be so employed, yet I prefer the stopplate herein' shown, since a positive adjustment in the height of the window-sash is thereby always secured.

In my sash -lock the levers A are not fulcrumed by means of the usual fulcrum-pins, but have their fulcral bearings formed by the walls of the cup shaped recesses sunk in the two plates which constitute the lock-casing, the levers being cast with annular disks having their peripheral bearing-surfaces adapted to bear against the walls ot' the said recesses, thereby affording broad bearings, and also obviatin g the strain upon a single fulcral pin, as heretofore. Each lever is formed with a coucavity, C, alongside ot' which is the disk D, constituting a wall at one side of such concavity. A portion of' each disk projects from the lever with which it is cast, so thatv when the two levers are confined or coupled together within the lock-casing the disk of one lever will rest against one side of the other lever, while the disk ot' the said latter-1nentioned lever will rest upon that side of the former lever which is opposite to the side thereof from which its disk projects. Under this construction an annular chamber, E, for confining a coiled spring, F, will be formed between the two levers when they are brought together in proper position, the ends ot said spring extending a short distance out from said chamber, so as to bear against the handle ends of the lever, in order to force the handles apart and thereby close their jaws.

It will be seen that the union ot' the disks D and their respective levers occurs at the sides ot" the disks, wherebyfthe latter have each a continuous peripheral bearing-surface, d, which lits within the cup-shaped recesses g g ot' the plates G G, constituting the two portions ot' the lock-case. rlhe outer or cap plate, G, of the lock-case is formed with lugs or ears g g', made with holes, through which screws are passed to secure the case to the sash, while the inner or foundation plateot` the ease has its ends adapted to seat into notches g2, formed in the inner sides of said lugs of -the outer' plate. This construction would of itself hold the two plates together after the application ot the case to a window-sash; but in order to secure the plates together prior to such application,vI pass a rivet, H, through the two plates and through holes formed through the disks of the levers. This rivet does not, however, constitute a fulcrum-pin for the levers,but serves merely to hold the two parts of the lock-case together.

It Will be observed that this construction of lock-case is exceedingly simple and cheap, and

that the drilling incident to the production of ordinary lock cases is avoided. The disks bearing in the cup-shaped recesses incur such strain as has heretofore been borne by a pin, and hence not only is the mechanism rendered stronger, but also it works much easier under all circumstances.

1. In a sash-lock, a pair of levers adapted to constitute expansiblejaws and handles, and formed with disks received into cup-shaped recesses formed in the 1ock-case to serve as bearings for the disks, substantially as described. g

2. In a sash-lock, the pair of levers A, each formed with a concavity, C, and a disk alongside ot such eoncavity, whereby, when said levers are brought together and inclosed within the lockease, substantially as described, a chamber, E, for the spring, will be formed between tile opposing faces ofthe two disks and the walls otl the said concavities, substantially as described.

3. In a sash lock, the combination, with a pair of levers provided with expansible jaws with curvedv segment-shaped ends, of a stopplate formed with concavities to receive the ends ot the said jaws, and also formed with a stud or projection intermediate ot' said concavities, substantially as described.

In testimony whereof` Ihave hereunto set my hand in the presence of two subscribing witnesses.

CHARLES B. CLARK.

Witnesses:

J AMES L. NoRRIs, J AMES A. RUTHERFORD. 

